We live in the digital age remember. Saying that a popular music video is more important to people than the events of WW2 or freedom of speech.. Well, don't be silly of course not.
The idiots who like that go back for more and other people go on because they need to see wtf this fad started from. 2012 is year of the Gangnam Style. 2013 it'd be old and something else as cheesy and weird will come along.
Its just a poor mans Macarena anyway. Everyone was doing that in the 90s, every single disco. It died and so will Gangnam Style.